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  #1  
Old 14-07-2010, 10:44 PM
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Talking Dual Battery Systems

Searched and couldnt find a list of systems... So being bored, with a few Coopers Green's thought I'd list a few...

I didnt realise there were so many Dual Battery Setups out there. I've had the Piranha in the GQ, and the Projecta on the GU and have been happy with both, although I need to replace the Projecta after I snapped a stud on it +

The differences in prices are mad, from $75 - $1500 ! Why the great difference in price!! Is it the usual scamming of 4wders?

So theres the regulars out there:
Piranha (Few Options)
ARB Smart Solenoid
TJM DBS and IBS
Ironman Dual Battery
4wd Systems
BEP Marine HD VSR
OL Chargemaster DBS Split Charge Isolator
Rotronics (has great wraps)
Matson MA98500
Projecta
Redarc (has great wraps - cheap)
Traxide
Dualmate
Jaycar kit
ABR Sidewinder (3-4 options)
Baintech (never heard of)
GSL Dual Battery ISOLATOR
Ctron

... and the list goes on.. Places like Repco/Supercheap have their own rebadged units. and Numerous Auto Elec own made things advertised on the interwebs....


I'd love another Piranha system, but cant justify the price... Their service is great, John who bought my GQ took it to them with an issue, they replaced the unit free on the spot around 4yrs after I bought the setup!


What do you have and why? Was price the main consideration?
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  #2  
Old 15-07-2010, 11:42 AM
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I have the Projecta 100 amp and I am very happy with. I have had no problems with it after 2 years use.
Price was the main consideration for me as I was just starting to put accessories on the Patrol.

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  #3  
Old 15-07-2010, 11:56 AM
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I have just fitted a Electro BI-80 voltage regulated isolator (paid $150 but I hear you can get them cheaper on the net) Works ok so far. Pryor to that I just had a 30 amp relay set up to isolate the second battery when the vehicle was turned off, this system also worked fine for me because I only ever ran a fridge off the second battery.
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Old 15-07-2010, 01:44 PM
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I have a dual battery setup and at the moment i dont understand the concept of having two? Yes i know to run fridges etc and not flatten your main cranking battery but all your standard stuff runs off your standard battery eg lights stereo. So even if you left your lights on and had the fridge on your stuck, please correct me if im wrong but thats how im looking at my system at the moment.

I bought my car with the dual battery setup and one day thankfully at work left my lights on i thought yeah no worries i have two batteries but how do i connect them did a bit of research and sure enough found the reason the solinoid runs off the main battery so if i had left my lights on and flattened the 'main' battery i couldnt activate the solinoid to join the second one in line. Easily fixed just bung a sepparate switch in the is connected to 'aux' battery bobs your uncle.

BUT if you have everything else running off your second batt eg fridge work lights etc etc and you forgot to turn ur lights off (headlights that is) or stereo, you will end up with two flat batteries and will be going KNOWHERE!!

any objections please let me know ha ha
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Old 15-07-2010, 03:18 PM
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I have the Redarc 100Amp Smart Solenoid.

I bought it because it had good wraps, was simple and was reasonably priced.

My dual battery needs are simple - I only run an engel fridge, cb radio and lights for when I go camping and driving.

I've only had it for 7mths and haven't had a problem.

In my previous 4x4 all I had was a basic solenoid isolating the two batteries when the ignition was off and connecting them when engine running. For $60 it worked great for the 7 years I had the car for.

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Old 15-07-2010, 07:22 PM
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Redarc for me , Cheap and does what they all do, Dont like the fancy,bling,bling gauges and lights in the dash, I like to look at the scenery not check how many volts are in the Batt. Thats what the multimeters for under the back seat. Gauges arn't going to stop it going flat or sh**#ng itself, But yeh they have a good rap , easy to install, And made here.
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  #7  
Old 15-07-2010, 11:32 PM
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Had a 150A Projecta on my Rodeo, never missed a beat. In the Patrol I have the batteries in parallel via a solenoid when the keys in Acc or On.
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  #8  
Old 16-07-2010, 12:55 AM
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I've got a redarc. reasonably priced and does exactly what it says on the box, the other reason i got the redarc was i liked having the option to manually activate the solinoid and link the two batterys ie. jump start myself if main battery is flat
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  #9  
Old 16-07-2010, 10:13 AM
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Anybody running the ARB Smart Solenoid?
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Old 16-07-2010, 11:56 AM
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Hey mate, Ive got a 140amp VRS. Been on for 4 years now no issues.
Do you run the same battery in aux as the main??
My understanding was its ok to run VRS, or a solinoid/relay type if the battery is the same, and you had to run a "fancy" one if you were going to run AGMs, Calcium etc.
Please correct me if I'm wrong. Redarc bought out a D/C to D/C charger that will charge any type of battery(does all that pulse technology and stuff) but at $495, its just to exy.
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  #11  
Old 17-07-2010, 09:01 AM
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I have a projecta 150amp. I also snapped a stud off, but where it snapped off I drilled & tapped a thread. Put another stud in & it works fine. Saved me having to buy a new unit.
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Old 17-07-2010, 01:46 PM
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Most of them do about the same, it's just a matter of what features you feel you need v's cost.

The Biantech unit is a simple reliable unit with no frills that will last many years.

I've had a few of the Piranha units and they have all worked great and great back up from Al @ Piranha.

A fairly new set up that some are using is the Ctek D250S. It has dual inputs for your alternator and for solar panels or hooked up via your main battery like a std DBS. This unit is like an intelligent battery charger and will change the charge dependant on the condition of the battery, the temperature etc. Also can be used from your camper trailer to charge it's battery.
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Old 17-07-2010, 08:35 PM
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Quote:
Originally Posted by truckster View Post
Anybody running the ARB Smart Solenoid?

Yep onto my third one (three different Patrols) Very easy to wire in & have never had a problem at all. I like the emergency start feature. Which is just a button on the dash you push and hold to link the batteries. Often press the button so it loads up both batteries to start. I run 2 start batteries not a start and a deep cycle.

Last one I brought I was in a hurry so went with what I knew - They are getting expensive now and I wonder if there is a cheaper alternative that will do the same job? Redarc maybe?
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Old 17-07-2010, 08:49 PM
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I have the Redarc with AGM batteries in the camper. Only issue is that the AGM's charge up to about 13V and the redarc did not release for a long time after the engine stopped. During this time my camper batteries were dumping their charge back into the starting battery. Easily solved by wiring a diode between the earth terminal of the redarc and ground. That lifted the reference voltage up by about 0.6V and the Redarc now drops out within 10 seconds or so after stopping the engine and still cuts in shortly after starting.
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Old 17-07-2010, 09:03 PM
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Quote:
Originally Posted by TB45_Bruce View Post
I have the Redarc with AGM batteries in the camper. Only issue is that the AGM's charge up to about 13V and the redarc did not release for a long time after the engine stopped. During this time my camper batteries were dumping their charge back into the starting battery. Easily solved by wiring a diode between the earth terminal of the redarc and ground. That lifted the reference voltage up by about 0.6V and the Redarc now drops out within 10 seconds or so after stopping the engine and still cuts in shortly after starting.
Funny you say that I went up to lonsdale here where they make them,and asked why mine was doing it,The guy said they can adjust them but said when stopped turn youre lights on for 2-3 seconds and it switches it! I dont think it takes alot out of the aux. anyway,he said there set to switch at 2.7V from memory
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Old 17-07-2010, 09:54 PM
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Quote:
Originally Posted by truckster View Post
Anybody running the ARB Smart Solenoid?
Yes I am using the ARB.
It is essentially the same thing as the Redarc. 100amp solid state solenoid with a small solid state switching unit.

I use it only to charge the second battery.
When I want to connect both batteries for extra starting power or when winching, I use a pair of manual boat battery switches, one on each battery that will take 275amp continuous 455amps intermittent or up to 1250amps cranking.

http://www.bepmarine.com/home-mainme...battery-switch

This setup will use the lower current smart solenoid as the charging curcuit and then allow me to connect No1, No2 or both batteries when I need them for winching or starting.
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  #17  
Old 17-07-2010, 11:11 PM
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Quote:
Originally Posted by geordie4x4 View Post
Yes I am using the ARB.
It is essentially the same thing as the Redarc. 100amp solid state solenoid with a small solid state switching unit.

I use it only to charge the second battery.
When I want to connect both batteries for extra starting power or when winching, I use a pair of manual boat battery switches, one on each battery that will take 275amp continuous 455amps intermittent or up to 1250amps cranking.

http://www.bepmarine.com/home-mainme...battery-switch

This setup will use the lower current smart solenoid as the charging curcuit and then allow me to connect No1, No2 or both batteries when I need them for winching or starting.
fotos of the setup??
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Old 24-07-2010, 01:06 PM
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Thanks Truckster Yes good idea,
heres some photos.

Engine bay with both batteries and the manual boat switches for linking both batteries or for running the winch from one or both.


Left side battery with fuse box battery terminal (Projecta brand) and the BEP battery switch on top.


Drivers side battery


Position of smart solenoid is down on the drivers side inner guard (bit hard to see) There is also a boat type BUS bar for connecting all the negative wires from everything back to earth and a thick lead back to the battery negative.
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Last edited by geordie4x4; 24-07-2010 at 01:45 PM.
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  #19  
Old 24-07-2010, 05:38 PM
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sweeet
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  #20  
Old 24-07-2010, 07:07 PM
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redarc- best bang for your buck.

setup with an overide switch so i can jump start off the second battery if i ever need to.

winching off both batteries is sweet to.
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